Development - Engineering


Jay Watson  - DirectoR

Phone: 985.809.7448

The Department of Engineering is responsible for the review and approval of subdivision development, commercial and residential permits, and compliance with federal and state stormwater and coastal regulations within unincorporated St. Tammany Parish. The review processes ensure that all new developments and permits are in compliance with current St. Tammany Parish Government Ordinances.

  • Our reviews include:
  • Subdivision Review
  • Drainage and storm water plans
  • Fill requirements
  • Water quality
  • Coastal zone management
  • Subsurface drainage
  • Driveway culverts
  • Traffic impact and flows
  • Site work
  • Ponds
  • Pools
  • Code violations

Our staff is comprised of licensed Professional Engineers, Engineer Intern, Certified Planner, Regulatory Manager, Subdivision Inspector, MS4 Administrator and Interim Coastal Zone Manager, Traffic Technician, and administrative support staff.

Frequently Referenced Documents:

Stormwater Agreement                                                      


Act of Correction  
Culvert Requirements
Coastal Use Permit - Online Tool Directions
MUTCD Standards
Pool Cross Section - Sample  

Questions we can answer: Please call our offiCe at 985-809-7448
Is my property in a Critical Drainage Area or an Area of Special Concern?
Why do I need a Culvert Data Form, Fill Plan, or a Form Board Certification?
How much fill can I bring on to my property?
Who do I speak to regarding a drainage problem?
What are the Coastal Zone Management requirements for my property?  


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  • Public Works Work Order Request Form
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Contact Us

  • Administrative Complex
    21490 Koop Dr.
    Mandeville, LA 70471

    Hours of Operation:
    Monday through Friday
    8:00am to 4:30pm by appointment only until further notice